# andOTP/andOTP

[Unmaintained] Open source two-factor authentication for Android

Repository: https://github.com/andOTP/andOTP
Canonical: https://ross.abutalabs.com/products/andotp
Language: Java
License: MIT
License Family: permissive
Topics: two-factor-authentication, otp, totp, android, material-design, hotp, openpgp, backup
Archived: true
Last push: 2022-06-14T05:44:55+00:00

## Health v2 (maintenance only)
Score: 10/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 0, release rhythm 8, longevity 100
- inputs: {"age_days": 3346, "days_push": 1541, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: archived
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 3714, forks 376 (observed 2026-08-28T04:08:15.337251+00:00)

## What it is
andOTP is an open-source two-factor authentication app for Android that generates TOTP and HOTP one-time passwords. It stores tokens in encrypted databases with Android KeyStore or password/PIN protection and supports encrypted backups.

## Use cases
- generate 2fa codes on android
- replace google authenticator with open source app
- store totp tokens encrypted
- backup two-factor accounts with openpgp
- scan qr codes for otp setup
- use hotp and totp on android

## When to choose
- you want a free, open-source, minimal-permission authenticator on Android
- you need OpenPGP-encrypted or password-protected backups of your tokens
- you want dark/black OLED themes and Google Authenticator compatibility

## When to avoid
- you need actively maintained software with security updates - the project is officially unmaintained
- you need iOS or desktop support
- you want push-based or FIDO2/WebAuthn authentication

## Facets
- artifact type: application
- maturity: abandoned
- function: auth, security, cryptography
- domain: security, privacy, android-tools, self-hosted
- platform: -
- tags: totp, hotp, two-factor-authentication, otp-authenticator, openpgp, unmaintained, android

## Member repositories
- andOTP/andOTP (main) score 10

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:08:15.337251+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T18:29:23.702085+00:00, confidence not recorded.
  - readme: https://github.com/andOTP/andOTP (fetched 2026-08-28T04:08:15.337251+00:00, sha 0dcfc2fecea4)
- Data as of 2026-08-30T08:39:29.467469+00:00.